The usual treatment: jessie and mariadb::core with 10.
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Change 289620 had a related patch set uploaded (by Jcrespo):
Depool db1033 (s7 old master) & db1029 (x1-slave) for maintenance
Change 289620 merged by Jcrespo:
Depool db1033 (s7 old master) & db1029 (x1-slave) for maintenance
Mentioned in SAL [2016-05-19T10:41:36Z] <volans> Disable puppet on db1029 for reimaging T112079
Change 289627 had a related patch set uploaded (by Volans):
MariaDB: Reimage db1029 to Jessie and MariaDB 10
Mentioned in SAL [2016-05-19T10:49:22Z] <volans> db1029 stop, backup and reimage T112079
Change 289658 had a related patch set uploaded (by Volans):
Repool db1029 (x1) with low weight
Mentioned in SAL [2016-05-19T14:20:14Z] <volans@tin> Synchronized wmf-config/db-eqiad.php: Repool db1029 (x1) with low weight - T112079 (duration: 00m 40s)
Change 289686 had a related patch set uploaded (by Jcrespo):
Repool db1033 after maint. with low weight; increase db1029 weight
Change 289686 merged by Jcrespo:
Repool db1033 after maint. with low weight; increase db1029 weight
Change 289838 had a related patch set uploaded (by Jcrespo):
Increase db1029 and db1033 weight back to normal after upgrade
Change 289838 merged by Jcrespo:
Increase db1029 and db1033 weight back to normal after upgrade
After the increase of weight of the slave, all x1 servers should be on jessie and a recent mariadb version. Only regular maintenance would be needed as usual.